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Reversible oxidation and critical current of YBa2Cu3Ox coated conductors

✍ Scribed by H. Claus; K.K. Uprety; B. Ma; A.P. Paulikas; V.K. Vlasko-Vlasov; U. Welp; B.W. Veal; K.E. Gray

Publisher: Elsevier Science
Year: 2004
Tongue: English
Weight: 548 KB
Volume: 416
Category: Article
ISSN: 0921-4534
DOI: 10.1016/j.physc.2004.08.008

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✦ Synopsis

We were able to vary the oxygen concentration of a YBCO coated-conductor sample from the under-doped to the over-doped regime. This was achieved by secondary oxygenation treatments at temperatures between 250 °C and 500 °C employing a novel oxygenation scheme. The YBCO-coated conductor was fabricated by the inclined substrate deposition method. Superconducting transition temperature and critical current as function of temperature and magnetic field were determined by a contact-free magnetization technique on a ring sample. It is observed that for temperatures at and below 77 K, the maximum critical current is obtained in the most over-doped state where the transition temperature is significantly depressed.

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